rough colony

Also found in: Medical.

rough colony

[′rəf ′käl·ə·nē]

(microbiology)

A flattened, irregular, and wrinkled colony of bacteria indicative of decreased capsule formation and virulence.

Mentioned in ?

variation

References in periodicals archive ?

Actinomyces israelii was identified from findings of Gram-positive extremely fine filamentous forms (see Fig.3), non-pigmented and non-hemolytic irregular rough colony morphology (see Fig.2), Catalase negativity, positive nitrate reduction test, negative urea hydrolysis test, negative Voges-Proskauer reaction and by extended biochemical tests to determine different sugar fermentation (see Table).

Primary actinomycosis of breast--a case report

[5] described the dry crystalline surface (rough colony morphology) as a positive result, disregarding the color (black or pink).

Investigation of biofilm forming ability in Staphylococci causing bovine mastitis using phenotypic and genotypic assays

Cultures were grown overnight on MacConkey agar, and a rough colony was placed in nutrient broth and grown for 18 hours at 37[degrees]C.